Google Fitbit Air Fitness Tracker - Brand New

• Tiny 5.2g pebble tracks 24/7 heart rate, skin temperature, and blood oxygen without a screen. • Advanced sleep tracking monitors stages, detects naps, and includes a vibrating alarm. • 7-day battery life with a 1-day charge in just 5 minutes. • Swimproof design is water-resistant up to 50 meters. • Open-source hardware allows for custom 3D-printed bands. • Syncs via Bluetooth to the Google Health app; core metrics are free to access.